Additionally 3 folders in "C:\ProgramData\Package Cache" one containing an EXE file (e.g. hdm16advanced_x64.exe) two containing MSI files (e.g. hdm16advanced.msi and UIM.msi)

Clearing %TMP% could be helpful as well: put your cursor into the address field, Ctrl-A, type %tmp% and your in. Then Ctrl-A again and the del key. Skip everything throwing an "access denied".