System Hangs during game installs - Puzzled help!

I have a very curious problem, that I never had before. My new computer I built hangs during installations (EDIT: from ISO Images) (of games say) but not during any other activity (like playing etc...).
The computer basically just Freezes - no response to anything, and I have to basically restart.
My system consists of the following (no overclocking of any kind):

Q6600 cpu
EP45-DS3L Mobo
2x2GB 5-5-5-12 ram
1TB Samsung HD
BFG 9800 OC

Now i ran memtest for about 12 hours and it found no errors in the ram. I am going to replace the harddrive with another one I have to see if that affects things...
I bought the CPU used from a person (not from store) so I am afraid it might be a faulty cpu. On the other hand I never hang while playing games so far. It is only when installing them. I use virtual drive software like daemon tools /alcohol %52, when installation hangs.

I was wandering if it could be anything with voltages on memory, cpu etc...?
Thank you if anyone cares to help,

One other thought, are you using an PATA-IDE DVD-ROM drive with SATA HDD's? I've seen incredibly long install times with this type of setup, many mainboards seem to disable DMA access for IDE devices attched to the parallel interface when mixed with SATA drives.

Stuart

Bump.. could it be the CPU???

Well it seems it was the motherboard! In particular Gigabyte EP45-DS3L.

I've gotten a new asus mobo and it works just fine.

i have the same issue, i bought my pc last Feb 13, 2009

Q8200
EP45-UD3LR
DDRII 2G/800Mhz (x2)
EN9400GT Silent
Seagate 160GB IDE
Seagate 80GB SATA
only 380W psu

and when i install games from deamon tools my pc freeze, i tried installing COD4 and NWN2 and it keep hanging and couldnt finish the install, but when i play games like COHF it run smoothly with no errors, i tried asking help from other forum and they say i should try upgrading my psu, anyone?

i just ran memtest86, found no errors
i just hope its my psu for insufficient power
i forgot, my lite-on dvd writer can not write files, i cant burn, my system could not detect any writers but it can read

Hi Guys,

I've had the exact same problem this week. What i've done to solve the problem is uninstalling daemon tools and installing an older version of daemon tools and now i can install everything without a problem lol..

I downloaded this version, hope it will help you guys out:
http://download.minoc.com/2007/16/daemon409-x86.exe

PROBLEM SOLVED SEE BELOW

ok so i have this same problem, however... my mobo is a:MA780g-ud3h from gigabyte, but i dont seem to have any gsrv.exe in process list or otherwise on the computer.


please help me =)