WoW and the Windows Update engine cause 80% of your CPU usage. some spikes are only caused by DPCs: Total = 32336 for module ndis.sys Elapsed Time, > 4096 usecs AND <= 8192 usecs, 1, or 0.00% Total = 14752 for module ataport.SYS Elapsed Time, > 1024 usecs AND <= 2048 usecs, 2, or 0.01% Total = 1353 for module acpi.sys Elapsed Time, > 1024 usecs AND <= 2048 usecs, 13, or 0.96% So ACPI causes the spikes which causes your issues. Try a different power plan and update the BIOS of your laptop.