I have a Intel Pentium 4 3.0E GHz (HT) with Windows XP Pro SP2. Since a very long time my system would at any time shut down and restart again on its own without warning. After elemating vurus, spyware, malware I zeroed on to my Ram modules. My RAM modules are inserted in Socket 1 and Socker 3 on the mobo DIMM sockets. On checking with RAMCHECK software I note that in several steps it reports "Failed". On inserting the RAM modules in Sockets 2 & 4 the same results. On checking the individual modules one by one in Socket 1 the results are Successful". However on checking the individual modules in Sockets 2,3 & 4 the report says Failed. DO I ASSUME THAT THE DIMM SOCKETS ON THE MOBO ARE FAULTY ? Since the last one month I am using only one Ram module in DIMM Socket 1 and since then the system has never at any time shut down and restart as was earlier. The only defect is that my system has slowed down. I have not been able to check the Ram modules on any other syster.