What causes files to be corrupted while downloading

And note that cloud storage and other file syncing options may not be enough to get the job done. If you do rely on cloud storage, at least make sure that you have the option to recall previous versions of files like in Dropbox. Next up on the prevention checklist, make sure that your computer is protected from viruses and malware. This includes not only running a good antivirus app , but using common sense when browsing and downloading.

And finally, you might want to consider investing in an uninterruptable power supply UPS to help protect your computer from sudden shutdowns when you lose power. A UPS works as a battery backup that provides you a buffer against power loss. Typically, they can supply your computer with anywhere from a few minutes to an hour or more of power, giving you ample time to shut your computer down properly.

Having a good UPS can not only help prevent corrupted files from a bad shutdown, but the hardware problems they can cause, as well. If you have a corrupted file, your best bet is to try grabbing that file from the source again. It scans your system for corrupted system files, and then replaces them with originals. If you suspect a bad update caused the problem, you might be able to roll that update back.

Some apps like those included with Microsoft Office autosave multiple versions of your document, letting you open a previous version if the current version becomes corrupt. Again, Microsoft Office apps offer built-in tools for recovering lost or corrupted documents, as do some other programs. Even if you can only recover the text from a document, you can save a lot of time when recreating the file.

There are also a number of apps out there that claim they can recover different types of corrupt files. And a few that we tested were bloated with companion apps or, worse, malware. Given that, we recommend just not using them. Browse All iPhone Articles Do you know of any moonlighting jobs using your pc where you can work from home in the evenings or on the weekend?

I believe that if gamma radiation very high energy x-rays can cause data coruption on a HDD you have a more serious problem. Your exposure to the same radiation. As it is gamma should have no effect on a HDD. Moving a drive while it is in use or dropping it can an most likely will cause problems as Leo suggested. Again if you have a gamma source near enough that you think it could be causing your data corruption then you yourself are in some danger.

It seems that a careless shutdown or accidental power loss can cause file damage…can you comment? Correct powerloss can cause data loss.

Thus, it is easy for a poorly timed powerloss to cause data you thought was hardened to disk to be lost. This problem should not exist for a shutdown, as the operating system knows to flush those buffers during that process. Frank, how in the world would a person be exposed to gamma rays in normal, everyday circumstances? Alpha, beta and gamma rays are everywhere around us. Part of these rays are coming out of the earth e.

Compare it to the light coming from the sun. Cosmic rays may contain high energetic neutrons, protons, electrons and so on. Some places on the earth are absolutely unfriendly to life and just as you may develop cancer after exposure to sunlight you may also develop cancer by breathing air with Radon in it.

As a scientist I do not suppose hard drives to fail by a normal exposure to the rays mentioned above—this story is probably an easy way out for someone who can not think of anything else. What about the rays used at airport security checks? I always come across quite a number of crc errors and data corrupted every 1 out of files I downloaded. At first, I could unRAR those files, but the next time I tried to do that, the files turned corrupted, crc errors or checksum does not match when I made a checksum file.

Leo, would you mind commenting on this issues. Is my hard disk drive starting to fail or is it very common now that datas can be easily corrupted in hard disk after being kept for a period of time? Is there a way to minimize such problem as it started driving me nuts. If you are getting that many errors, something is definitely failing. Get the ones you can read copied aka backed up somewhere else and keep trying the other important ones until you get luck in getting them read.

Time to get a new drive. Toyota problems with highly computerized, wireless devices, voice activated automobiles of today?? One sure way to get corrupted magnetic media of any kind is to put it on or near the floor on an electric train, overground or underground. The motor under your feet generates a very powerful magnetic field and will corrupt the data on the media. It happened to me a long time ago with a box full of floppies which were wiped clean on the London underground!

I had a serious HDD crash a couple of years ago and had to buy a new one. However, I managed to recover most of my files off the corrupt disk by using Acronis Disk Director on a bootable floppy. This package got me out of a very deep hole! I am very impressed by this software and NO, I do not have any connection with the company that produces or markets it. Still, things can happen, such as dropping a laptop or a power surge or accidentally swiping it with an extra-strong magnet or dust getting through the filter and causing a head crash; and of course they sometimes fail for no obvious reason.

However in general it goes by the bathtub curve. You may like this little story as an epilogue to the problems of system crashes. We took the system apart and virtually rebuilt the hardware and software platform! The outcome was that we encased our computer room in foil insulated shutters and the RNTS changed their testing to 2am-5am!! We had no problems after that!! But yes if it gets repaired then only users can utilize their PDF files otherwise nothing can be done.

SysInfoTools knowledgebase. What are the reasons behind the corruption of PDF files. Learn more. Excel file get corrupted while downloading from server using java Ask Question. Asked 8 years, 5 months ago. Active 4 years, 3 months ago. Viewed 3k times.

Improve this question. I have added catch to find out the problems during downloading and want to show proper massege to user. I had got the solution. I had removed the " response. Add a comment. Active Oldest Votes. Improve this answer. This command will process to check all the errors of the protected system files. If errors found, it will replace the corrupted system files with a cached copy. Here is how to run the SFC command:. Go to the search function from the bottom-left of the Windows taskbar and type cmd , it will then show you the Command Prompt.

Right-click on it and select Run as administrator. If corrupted files are present, Windows should locate and repair them. Try running the command described in the Windows XP and Windows 7 section. If there are no issues, close the command prompt.

If there are issues, proceed to step 2 below. Wait and then restart your PC. The Check Disk command is an advanced built-in error checker of Windows. You can perform a check on a drive, directory, or a specific file and fix the error automatically using this command.

Note that there are possibilities you will lose some of the data since it will automatically fix the errors. To run the check disk command,. Open the search box and type cmd. Right-click on the command prompt and choose Run as administrator. If the disk you run the command cannot be locked, then you cannot perform the check disk right away.

It will ask if you would like to check the drive next time you start the computer, type Yes, and hit Enter. Then restart your computer and it will run the command itself. This will help fix all errors in the corrupted files. There are now many online tools that can solve user problems. You can try a file repair tool to see if it can fix your corrupted file.