you could do it manually.
regedit and remove anything that has to do with that file/folder (use the find option... really easy)
then after you can't find anymore references... try delete again.
Case:NZXT Trinity Silver PSU:Apevia Aspire 500W UV Green Motherboard:Asus A8N-SLI CPU:AMD Athlon 64 3500 CPU Cooler:Zalman CNPS7700-Cu Video:2x eVga nVidia GeForce 6800XT (256MB DDR) RAM:2Gig (4x512 Corsair TwinX dual channel) HDD:160Gig Seagate Barracuda SATA, 200Gig Maxtor SATA III CD/DVD:LG DVD ROM, NEC 16XDVD+-RW
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(")_(") to world domination