Welcome to the Seven Forums sli6.
You should download Windows 7 Ultimate 64-bit installation ISOp Image from Official Windows 7 SP1 ISO from Digital River « My Digital Life
and burn it on a DVD to produce the Windows 7 Installation DVD.
Use this DVD for a fresh and clean installation of Windows 7 Ultimate 64-bit on your Laptop. Then you activate it with the same Product Key that you are using at present.
Then install all your third-party Programs including the Anti-Virus Program and Firewall etc. Don't use McAfee but instead use one of the Programs that I had suggested in my earlier message.
Please also be informed that what I have suggested is completely legal and you would not be infringing any law. In addition you shall be getting a bloatwareless OS.
Good luck to you.