Over the last few weeks I've had a repeated occurrence of virtual parts being deleted. When I un-suppress the part I receive the "Unable to locate the file C:\\Users\\User\\AppData\\Local\\Temp\\swx####\\VC~\\....."

Why is this happening? It is extremely irritating as most of these parts are ONLY virtual, thus I have to remake them!

To my knowledge there is no program on my PC which would be clearing the temp folder. I have never manual deleted anything from Temp.