1. In the windows folder there exist three AU_X (where X is Backup, Log, and Temp) subfolders. Are these folders necessary? (temp is 30MB in size)
2. There is the folder $hf_mig$ (139MB) What is it? Is it necessary?
3. There are about 45 folders named $NtUninstallKB...??...$ each about 3/4 MB What are they? Are they necessary?
4. There about 30 folders named $NtUninstallQ...??...$ What are they? Are they necessary