Windows 7: computer suddenly very slow. cpu usage <10%

belseat,
Do you have a Win 7 install DVD? Yes/No
Do you have a Win 7 System Repair Disc, made by Win 7? Yes/No

How many of the steps in Greg's tutorial have you managed to complete?



Please list precisely by step number.
Those steps must be performed in the sequence he gives.

i don't have the install DVD or the repair disc.
about to start going through the list now. will report back with anything remarkable.

thanks again for the help

Same thing happens when i try to boot into safe mode. it shows the list of drivers it's loading and the list stops at "CLASSPNP.SYS"

Then you'll need to work with the boot disks until it will boot. Continue with the steps.

I got Windows Defender Offline loaded up on my USB flash stick. it booted up to do the quick scan. it finished the quick scan in about 12 minutes. no errors.

Then i tried to do a full scan. it got stuck at 50,000 items and about 32minutes time elapsed. the "Time elapsed" counter stopped moving, but the green bar animation kept going.
it was stuck there for about an hour, so i did a hard reset of the computer and now i've restarted the full scan. will update asap.
if it gets stuck again, i won't be able to try the other anti virus CDs as i don't have access to a computer with a CD/DVD drive

Edit: got stuck again at about 32 minutes with 220124 items scanned.

sometimes caused by heat problems.
Point a fan at your computer and run the WDO full scan.

If still fails, then test ram:
RAM - Test with Memtest86+

i'm in an air conditioned room, but i tried the fan thing. no change.
running the ram memtest.
finished one pass with no errors. i don't think i'll have time to do all 7 passes. need to leave for the airport in 90 minutes.

what's the next option?

I'll wait for your reply after you have run the 7 passes.

You can let memtest run while you're gone or asleep. The longer the better to stress the RAM.

ok. i got back from my trip. i managed to get windows defender offline to run a full scan. nothing found.
i ran memtest overnight. it completed 12 passes. still no luck.

i'm doing this now:
4. Once the System is clean if it won't start boot into System Recovery Options via the F8 menu or disk as shown in tutorial, run Startup Repair repeatedly up to 3 separate times with reboots in between each - no matter what it reports.

5. If you need an installer for your licensed version to boot to run Repairs or possible Clean Reinstall, download the latest official Windows 7 installer w/SP1 ISO, burn to DVD or write to flash stick using Windows 7 USB-DVD Download Tool.


i'm Downloading the Windows 7 .iso