first off i wanaa tell u... i hav hp pavilion dv4 -1318TU , 4 gb RAM and 320 hard disk,,, i hav installed window 7 home primium, but it giving errors like 0x0000005, i cant open application. antivirus, nothing....... and now i trying to install window 7 ultimate again.... it is not working.. just option comes on screen click to boot.. then it upload files.. after that.. previous windows come.... help me .....