I hve upgraded my P4 1.6GHz from 256MB to 1GB SDRAM (Hynix), Mother board is i845. Also changed motherboard lithium battery to new. The system reboots or crashes. What can be the problem. Also, I have DVDROM and CD-Writer drives on same cable., Now The pine DVD Drive is not being recognised and the drive Name in BIOS and in windows has crypted characters with $ in their names. Earlier it was not so. When i re-changed my RAM to previous 256MB, still the DVD Drive name is not correcetd in BIOS. Please some one examines the attached miniDumps. What hardware or software could be the problem?