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I'm using Windows 7 x64 Ultimate, I'm getting windows error popups like this one for about 3 days, multiple times a day:

Screenshot

This Samsung SpinPoint F3 HD502HJ 500 GB is about 2 years old and I already checked it with Samsung ES Tool 3.0, did all the scans (took hours) and everything is fine!

I have no malware, viruses and this started to happen after I have had some electrcity issues at my house (multiple power surges / overvolatege during the night, PC was connected, but turned off), any ideas?

What other test should I perform? I believe the disk could be damaged, but then diagnostic tools should prove this, right?

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Backups. Do backups. –  grawity May 4 '12 at 13:02
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Like to add "now" To @grawity 's comment (: Furthermore, you should always backup before running diagnostics since using the disks (as diagnostic tools might do) may damage the disk even further. –  BloodPhilia May 4 '12 at 13:05
    
Thanks for the hint, backups already done though! :) –  bart May 4 '12 at 13:11
    
Buy a new disk, restore from backup, throw out the old disk after hitting it with a big hammer. Buy cheap lunches for a week. You now have solved your problem for zero overall financial cost. –  RedGrittyBrick May 4 '12 at 13:26
    
Download DiskCheckup to check the SMART status. Are there any pending/reallocated/uncorrectable sectors? –  Bigbio2002 Jan 7 '13 at 6:13
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3 Answers

As the comments suggest... backups! Can never have enough backups. Even if the disk remains fine, at least you'll have peace of mind should it fail.

Have had a similar problem with a machine at work, yet that is working more than a month later so.. its possible the disk is fine, but you never know. Running a check disk wouldn't hurt:

How to - http://www.sevenforums.com/tutorials/433-disk-check.html

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Made multiple scans for both bad sectors and system errors, scanned every drive, even the "healthy" ones, everything is fine... –  bart May 4 '12 at 13:25
    
Looks like the power surge you experienced caused some electronic interference. In which case, i'd probably buy a replacement ready in case it does fail. –  Dean May 4 '12 at 13:37
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I'd be buying a replacement disk. More space for backups and when your disk does fail you will be offline for a shorter amount of time because you had a disk on hand to rebuild your computer with.

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Backup then SpinRite

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