Along with Windows 7 public RC, Microsoft has also released the Windows 7 upgrade advisor.
What is Upgrade advisor ?
It is a tool / program which helps you to determine whether all hardware and software present in your PC / notebook is compatible with the new OS, in which you plan to upgrade !!!
In this case Windows 7 upgrade advisor can be installed on Windows XP / Windows Vista to find out all software and attached hardware are fully compatible with Windows 7 or not.. Basically it lets you know that whether your PC can run Win7 without any issue or not !!
Where to get Windows 7 upgrade advisor ?

The beta version of this software is available free for download -> http://www.microsoft.com/windows/windows-7/upgrade-advisor.aspx
How to run Windows 7 upgrade advisor ?
The installation is very much straight forward !!

Once launched, it takes few minutes to scan the system to gather information and generate the final report.

In my case, I am running this tool under a Lenovo Notebook running Windows XP x86 SP3 on a 15GB HDD partition. You may see at this attached report card generated by the tool has found system needs a clean installation (upgrade not possible) along with HDD upgrade due to small size of it. Else, the computer is ready for Windows 7.
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about 1 year ago
Hello Choto Cheeta,
I have been facing this problem since quite a few months and thought of seeking your help on this subject.
My PC config is -
Intel Pentium 4 (2.4 Ghz)
1.25 GB DDR1 RAM
Intel 845 chipset with onboard graphics
200 GB HArd Disk Drive
My problem is that I have been operating on Windows 7 RC 1 since the past two months and everything is working perfectly except the graphics. All graphic related objects such as games show that my hardware acceleration is disabled. When i inspected my PC for the problem it showed that my graphic drivers are out of date. The issue is I have no current internet connection on my PC so it is not possible for me to use windows update. I usually visit cafes for internet and tried to download the drivers I wanted. However either it turned out to be incompatible with my OS or in most cases my hardware.
Can you kindly post me links or sites where I would get these drivers. I am desperate. Please help