I have no idea what sort of problem to look for.
A reliability problem can be almost anything.
There is an HP service that might have a problem shown in the Perfmon report
The D: drive has less than 11% free space - please free up 15% on all drives
There are no signs of a BSOD in the BSOD reports that you uploaded
System info report shows that you only have Service Pack 1 installed.
I no longer track Vista systems - but I suspect there are 400 to 500 updates AFTER you install Service Pack 2
Please get all of them before we further start analyzing this. Submit another set of reports once the updating is done.
There are signs that there could be an infection present on the system.
Could you be infected? It's possible that malware has corrupted your current protection, so please try a couple of these, independent scans (from this link: https://www.us-cert.gov/ncas/alerts/TA15-286A ). This is in case your current protection is compromised by malware and giving false results:
https://www.f-secure.com/en/web/home_global/online-scanner (link is external)
http://www.mcafee.com/uk/downloads/free-tools/stinger.aspx (link is external)
http://www.microsoft.com/security/scanner/en-us/default.aspx (link is external)
https://www.sophos.com/en-us/products/free-tools/virus-removal-tool.aspx (link is external)
http://housecall.trendmicro.com/ (link is external)
The above are examples only and do not constitute an exhaustive list. The U.S. Government does not endorse or support any particular product or vendor.
If you do find infections, I'd suggest posting over in the Am I Infected forum to ensure that all the bad stuff has been removed: http://www.bleepingcomputer.com/forums/f/103/am-i-infected-what-do-i-do/
Please read the pinned topics at the top of the forum for instructions on how to post there.
Only run one antivirus and one firewall at a time. If you run more, they can conflict - causing reliability problems and even letting malware onto your system.
You have both Avast and AVG listed in your startups.
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