Solved: I Can't install XP3

Hello.
I want to install XP3 pack for my windows, and I can't do it.
Every time i got message that setup cannot copy the file atapi.sys. I search over the internet and find that if you got installed Alkohol 120, that problem may occur, so I should uninstal alkohol first than try to instal SP3 again.
I dont know why i had problem with uninstaling Alkohol. It showed me from add remove programs that there is trial version, so I uninstaled it, but Alkohol was still on my computer, but not in add remove programs. So i just deleted all alkohol files myself with shift+del , than run ccleaner to clean registry.
Now i,m trying to instal XP3, but nothing change, still getting the same message.

Please help, what should I do.

 

Try disabling all firewall and anti-virus software on your computer.

 

Thank you for answer. I did what you said and it did not work.
Any other idea to help me to instal this SP3 pack.

 

Try installing it in safe mode

 

Thanks for your suggestions, but I've already solved my problem. I serched over the internet and find that I need to change name of this Atapi.sys file to Atapi.old. I did that and SP e has installed without any problems.

Thank you for your response.