I purchased an Acer Aspire M5201 desktop and used it for a bit over a year and had hard drive failure out of warranty. Contacted Acer tech support once new hard drive installed because restore disks were Vista 32 bit and the system came with Vista 64 bit installed to access all the memory. Explained to them that system came with 64 bit per-installed which they said could not be (my receipt shows 64 bit), they escalated to level 2 and they said I need to buy the 64 bit disks! ACER IS A RIPOFF! Buy from a reputable company that backs their product.