I have an a1226n HP desktop(Windows XP home edition),shortly after purchase, I noticed it would not go into stand by mode. HP blamed it on widows and windows blamed it on HP. After a few weeks I found a setting to prevent PC from wakening at the airport. I thought it was a mistake, but placed a check mark in do not allow box. This corrected the problem, until I set my PC back to factory spects, now problem is back and I cannot locate this window. ---- Any ideas?