Team fortress 2 validating steam cache
It's unfortunate that it's the only option but perhaps you can let it download overnight.
If there are individual files you can narrow the issue down to that are not huge, try deleting them and re-downloading/verifying to see if it helps.
So, if you have any antivirus program running in the background, this file will be scanned all the time whenever it updates, which is too frequent.
Resulting in low performance of Team Fortress 2 or say Drop in FPS.
So, if you are among these and are experiencing any of these issues, start reading the troubleshooting guide that follows.
In order to resolve the issue, you need to add this file/folder into the exceptions list of your antivirus/internet security program so it doesn’t scan it all the time.
folder or you can back it up somewhere else and copy the maps back later.
Delete the TF2 folder, and redownload all the maps and mods you have from the Steam.
Don’t forget to make a back up in case you mess it up.9# HL2and Team Fortress 2 Crashes It seems most of the people with Windows 7 64bit version are experiencing random crashes with hl2of TF2.
You can run the game in windowed mode or you can disable the Windows Aero Themes.