where did you change the path for the C:\temp? I looked around under Control panel >System, but didnt see where to change it. Mine is the default location as well.
You are in the right spot, under Control Panel > System, on the left side there is a button for "Advanced system settings". At the bottom of the advanced tab there is a button for "Environment Variables..." Within that window you can edit the TEMP and TMP variables and point them to C:\TEMP.
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