Occasional crashes under XP Pro x64

[Jefepato]

I've been having occasional BSODs, followed by a restart after a few seconds (not long enough to read what it says). I haven't noticed anything in particular these occasions have had in common -- I haven't had any crashes while playing games, but I don't spend much time playing games, so that could easily be coincidence.

I just ran a disk check, which turned up nothing. With SpeedFan, I've verified that my power supply is fine and nothing is overheating. My computer isn't dusty, and the memory was checked recently. All drivers I could find have also been updated recently.

Specs as follows, thanks to Newegg:
CPU: http://www.newegg.com/Product/Product.asp?Item=N82E16819103759
Motherboard: http://www.newegg.com/Product/Product.asp?Item=N82E16813138041
RAM: 2 sets of these: http://www.newegg.com/Product/Product.asp?Item=N82E16820161030 (that is, 4 sticks and therefore 4 GB total)
GPU: http://www.newegg.com/Product/Product.asp?Item=N82E16814143080
PSU: http://www.newegg.com/Product/Product.asp?Item=N82E16817256006
OS: Windows XP Pro x64

Unfortunately, all my minidumps range from 160-168 KB, and this forum's maximum file size seems to be 100 KB. Do I have something set improperly in Windows? If not, is there some other way to upload minidumps that would be convenient?

 

[LinkedKube]

everything looks fine to me. probably gonna need a log to see what happened at bsod

 

[Jefepato]

Since the minidumps are too large to attach to this post, here's the sendspace links for the last five crashes. (Three of which were today, oddly.)

http://www.sendspace.com/file/5nxrl1
http://www.sendspace.com/file/xe35yf
http://www.sendspace.com/file/j4mcwl
http://www.sendspace.com/file/xs2raw
http://www.sendspace.com/file/v5jeqi

 

[Jefepato]

Minidumps, zipped

Alternatively, I could zip the relevant files, like so.

By the way, does anyone know if Service Pack 2 for XP Pro x64 can be trusted?

 

[Jefepato]

I probably shouldn't be surprised that Service Pack 2 didn't help. The latest minidump is included here.