Random freezes with windows 7 - 64 bit

Hi!

I am having an issue since one week ago (I have Win7 since December 2010 and no problem until now): I am surfing in IE, then Win7 freezes and some kind of blue screen shows up, but not THAT blue error screen, just a blue screen like that blue of desktop and the HDD-lamp keeps lightning, not blinking. I was having the same issue in the safe mode in the middle of searching something in the control panel. I thought I resolved the problem by unistalling and reinstalling the COMODO Internet Security, but obviously not. It was working fine since three days ago and now this. Maybe it is important: I noticed that after all checks, safe mode, clean boot, uninstall-reinstall CIS, laptop worked properly and I always shut it down by closing the screen (stand-by mode) and through hibernation and now the issue occurs. Any ideas? I ran sfc /scannnow and chkdsk and no errors. Other possible information may be: I noticed in the Event Log that before the system restarted today morning, System Time was set 2 hours before, means: Event Log noticed the event at 08:05 and said that system time is set at 06:05. Other one: COMODO said (in Safe Mode) that virus definitions were updated at 09:35 and the real time was 08:06. Another maybe useful information: just before freezing (in Normal Mode getting a light blue screen without any text, in Safe Mode just freeze without any chance of moving the mouse) it comes a very short kind of refreshing the screen, also when it's getting restarted at the Windows Logo.

Any ideas?

THX!

how can I find all these settings of ram timing and memory voltage and how do I find what timing and voltage RAM has and which is being set by BIOS?

Fixing the ram timing fixed my random freezes.  Thanks for the suggestion.  The motherboard set my timings to 7-7-7-20 when the ram called for 7-7-7-18.

Removing TDM - Trusted Drive Manager fixed my computer.

I have a Dell Precision T3500 Xeon W3520@2.67 (same as I7) with the VelociRaptor Drive, and Windows 7 Ultimate - 64 Bit.  I have had lock up problems since I bought the computer over 2 years ago.  The freezes allowed me move the mouse, but constantly gave "Not Responding" messages with the spinning cursor on every application window while the hard drive ran constantly for no apparent reason.

Looking in the "Informational Events" of the "Reliability Monitor", every time I restarted my computer I was getting 211 "Successful Application Reconfiguration" messages.

Since I removed TDM - Trusted Drive Manager on May 10, I haven't had a single "Successful Application Reconfiguration" message, and not one lockup.

There were also some Windows Security Updates on that day, but I doubt that was what solved the problem.

I don't know if I am losing anything by not having TDM running, but at least I am no longer losing my mind.  I don't know how many people have this on their computer, but removing it worked for me.

Hey,

Just wanted to state that I had been experiencing random freezing, and changing the memory voltage in the BIOS appears to have solved the issue.

For those who would like more detail:

I was experiencing freezes on a timescale of a few hours. Whether I was gaming, browsing, or even if the computer was idle, the screen would suddenly freeze exactly as it was. The mouse cursor wouldn't move, keyboard was unresponsive to ctrl-alt-del or anything else. If sound was playing, sometimes the sound would repeat in an infinite loop. The only way out of this state was to hold the power button until hard shutdown.

I've had the computer for about a year, and I first noticed this "Freezing" occuring quite early in the computer's life, with one difference: Originally, the computer had a tendency to freeze only when I bumped the desk it sits on. Only later, about eight or nine months in, did the computer begin to freeze even without my bumping it. I suspect that the freezes occurring when I bump the machine and the later freezes had different causes, but I mention the earlier freezes because the "freeze" itself was exactly the same in either situation.

As a side note: I noticed that freezes seemed to occur more often when I used alt-tab to switch out of a fullscreen window. I'm really not sure why. Other stress-factors included: trying to play dice in The Witcher, and trying to back up my files to an external drive (argh)

Anyway, once the freezes started happening on their own, I decided I needed a fix. I cleaned the whole machine of dust, rebuilt my water-cooling loops, stress tested the GPU and CPU, ran Anti-virus, ran diagnostics on the RAM, and even bought SpinRite to check if the issue was hard-drive related. None of these produced any results. However, after some searching online, I came upon Smoothf1's suggestion (And saw a similar idea in other places). As it turns out, the RAM I had put in the machine is supposedly rated for 1.65 volts, and the BIOS had set the RAM voltage to 1.64, since 1.65 and above is supposedly dangerous to i7 processors. After a little research, I concluded that it was worth the risk, and bumped my RAM voltage up to 1.65.

It's too early to claim that this solution fixed things absolutely, so I'll try and update later, but so far the machine has been running smoothly for about four hours, cruising thru prime95, browsing, idling, and file-copying. So it looks like upping the voltage helped!

Tune in next post, when I'll probably complain that my computer is freezing again and my CPU caught fire.