Log Name:      Microsoft-Windows-Diagnostics-Performance/Operational
Source:        Microsoft-Windows-Diagnostics-Performance
Date:          19.1.14 15:03:40
Event ID:      501
Task Category: Desktop Window Manager Monitoring
Level:         Warning
Keywords:      Event Log
User:          LOCAL SERVICE
Description:
The Desktop Window Manager is experiencing heavy resource contention.
     Reason         :             CPU resources are over-utilised.
Diagnosis     :             A sharp degradation in Desktop Window Manager responsiveness was observed.

This report has me puzzled on a Windows 8.1 computer on a good specification computer. Please make suggestions for investigating this issue.
    

Hi,

Did you make any changes on the computer before the issue happen?

Please install the WPT

http://social.technet.microsoft.com/wiki/contents/articles/4847.install-the-windows-performance-toolkit-wpt.aspx

Then, open a cmd prompt with admin rights and run this command for 30s:

xperf -on latency -stackwalk profile -buffersize 1024 -MaxFile 256 -FileMode Circular && timeout -1 && xperf -d cpuusage.etl

Press any key to stop logging. Then upload the file after zipped to the SkyDrive or similar network drive, and post a shared link here for further research.

Also, please check the following location to see if the Dump file exists.

C:\Windows\Minidump

If it exists, please upload the dump files so that we can help you analyze them.

Regards,