I bought a Sony laptop with Genuine Windows 7 Home Premium installed. I upgraded to Pro to match my desktop from what I thought was a genuine seller, but having read the threads I see 220 in the PID and getting messages it isn't genuine.

I was wondering what my options are to make getting a genuine PID as painless as possible:
1. Follow the windows validation route from laptop for £138 which seems to be buying a complete Win7 pro package. I am assuming this would be seemless and not affect any of my progrmas or files?
2. Purchase a full Win7 pro licence from another seller, assuming it is genuine. Question is what happens if you go to install Win7 pro genuine on a machine running Win7 Pro non-genuine? Can I use the upgrade menus and will this been a seemless "upgrade" leaving my programs and files OK?
3. Cheapest route reinstall Home premium OS that I have on disc then buying a genuine upgrade package for more like £80-90. While saving little bit of money I imagine this probably needs to be done as a clean install i.e. wipe all programs and files. Doesn't sound like a worthwhile saving in cash for the time involved.
Any advice appriciated especially if option 2. will work easily. i have asked this question in the MS forum and only anser was to use option 1, but £138 sounds expensive.
Mike
My Computer
At a glance
Windows 7 64 bitintel quad Q6600 2.4GHz4GBATI Radeon HD 4850 512Mb
- Computer Manufacturer/Model Number
- Dell XPS 430
- OS
- Windows 7 64 bit
- CPU
- intel quad Q6600 2.4GHz
- Motherboard
- Intel X48
- Memory
- 4GB
- Graphics Card(s)
- ATI Radeon HD 4850 512Mb
- Sound Card
- ATI High Def
- Monitor(s) Displays
- Dell 1707FPV
- Hard Drives
- 640GB RAID 0
320GB
- PSU
- 425W
- Keyboard
- Logitech MX3000
- Mouse
- Logitech M-RAG97
- Internet Speed
- 7Mb
