Explorer hangs up and forces me to close all Explorer windows. Seems to often happen after I have opened some files (.txt, .doc, .xml,...) and then closed one. Also when I am dragging a file from one folder to another. Typical message is something like: EXPLORER caused an invalid page fault in module <unknown> at 0000:01bb32f4. Registers: EAX=00000000 CS=0177 EIP=01bb32f4 EFLGS=00010202 EBX=0111ed32 SS=017f ESP=0111ece4 EBP=0111ed00 ECX=00890ff4 DS=017f ESI=0000bd56 FS=2db7 EDX=0000bd72 ES=017f EDI=0111ece8 GS=2bb7 Bytes at CS:EIP:  Some background: I have been trying to install an extra hard drive, so far unsuccesfully, and to fix/simplify my registry. One of the registry "Fixers" I ran I think "fixed" something it should not have - but I don't know what. geekhb

If it hasn't been too long you may be able to perform a registry restore. Look here for instructions on restoring the registry. http://support.microsoft.com/kb/q22...

Invalid page fault errors are often caused by bad or low memory. Here is a good doc for fixing: http://www.computerhope.com/issues/... Computer repair troubleshooter for fixing common computer problems