I just installed windows7 and after installing I put the system in sleep mode but could not wake it up. It happens many times whenever I put my system in sleep mode. How to fix this?
Control panel-->Power options-->change when computer sleeps->change advanced power settings and set the following options +Sleep Allow hybrid Sleep > disabled Allow wake timers > disable/enable try both settings
If that doesn't work, you can look in your BIOS; most machines have ACPI options. There are different modes that are usually set to S1 and S3. Change it to just S3 and see if it works.