Web-IT server access gets frequent timeout errors. Web-IT server machine CPU is pegged by w3wp.exe process (IIS worker).
IIS server getting multitude of requests in a short period of time.
Analyze IIS logs for source IP issuing multiple GET requests during short period of time. Block the offending source until problem is resolved.
Issue may be caused by DoS (Denial of Service) attack due to rogue software on the client machine. Also such issue was reported when F5 button was held on the client machine because of specific construction of the client station.