I agree that it sounds like there may be bad sectors on your hard drive and/or your WitPAE download may be corrupted.
Try re-downloading the WitPAE install file from the Matrix members' page - that's the easiest thing to try.
If that doesn't work, there are some free utilities that you can use to help diagnose and perhaps 'fix' any bad sectors (most times they're not repaired, but rather marked as not to be used any longer). The simplest thing to do is to open up File Explorer in Windows (press Windows Key + R and then type in "explorer" (without quotes) if you don't know how to get to it), then right-click the hard drive in question, go to Properties, then the Tools tab in the Properties windows that pops up. Under error checking, click the "Check" button and let it scan the drive.
Another way to do the same thing - but when Windows isn't active, is to use the "chkdsk" (stands for 'check disk') utility that has been around since the DOS days. Open up a Command Prompt with administrator privileges (you can do this by pressing Ctrl + Alt + Del to get to Task Manager, then clicking "File" at the top, and "Run new task". It's just like the Run window you used previously, but it has a check box to run something with admin privileges. Type in "cmd" (without quotes) into the box, and hit the Enter key. From the Command Prompt window, type the following:
chkdsk /offlinescanandfix It will tell you that it will perform a scan the next time you restart the computer. You don't have to restart right away - but do so at the next convenient opportunity and the scan will be done during the boot process.
You can also use the SMART diagnostics to see if there are problems popping up with your hard drives. Many utilities can access the SMART data - a free one is Speccy. It will give you warning symbols if any of the SMART stats are out of acceptable parameters. It's also useful to observe a drive over time - so you can see if a drive is progressively getting worse long before it fails - and take appropriate measures to back-up your data before there's a serious issue.
Although I admire the work of Steve Gibson at GRC, I would advise not to get SpinRite unless you're sure you need it. It is still the go-to hard disk tool for what I call legacy hard drives - but it cannot handle modern hard drives with large capacities and it certainly isn't of any use with a solid date drive, which is where storage is headed with PCs. That said, if your hard drive is close or greater than 10 years old, SpinRite can be an amazing tool to resolve bad clusters. It's basically chkdsk on steroids and can even fully repair bad clusters in some cases.
Edit: BBfanboy beat me to it while I was typing this up
< Message edited by Korvar -- 7/21/2017 5:01:10 PM >