frankbald

Hi, I have a problem putting to sleep my pc. I have windows 64 bit since I assembled this pc, but one day I started experiencing this problems. When I try to put it to sleep it takes at least 10-15 seconds, then it seems working and turning off, but after like 5 seconds it turns on again. What can I do? I tried to use "xbootmgr -trace standby -traceFlags BASE+CSWITCH+DRIVERS+POWER -resultPath C:\TEMP" but it tells me that xbootmgr is non recognized as a valid command.