Looking at the stranglehold Microsoft has on both the OS and office document markets, it’s difficult to imagine that one day in the near future they may actually struggle to deliver solutions that could find mass critical acceptance. However two researchers from Gartner like to think otherwise.
At a presentation at a conference in Las Vegas, analysts Michael Silver and Neil MacDonald have said that Microsoft is struggling with its flagship products as it is overburdened by nearly two decades of legacy code and on the spot decisions to scuttle controversial upgrades. It will also face serious competition on a whole host of fronts that will make Windows a has-been unless the software developer acts now to remedy the problems it faces.
The massive footprint of the 20 year old codebase makes it impossible to run with lower powered devices such as the new ULPC (ultra low cost pc) market.
For further details on this interesting problem, check out this excellent news report here.
Krishna... just for your information ... you are true XP1 and XP2 had come after XP ... but things to be noted in this real time world where the things get changes in a moment and Microsoft always want to be latest in technology so they had launced those service packs other then to launch to complete product . which they always launch in 4 years of time . SP1 and SP2 are just for the updates on XP not a bug. And please remember "Changes are always respectable and acceptable" . I believe it s a time to appriciate Microsoft to change this world with the help of Windows .Obviously Windows a wonderful / Interesting product ever in the Information technolgoy.. which works on works from last 2 decades confortable . People still happy to use that :) . We can't say Windows are collapsing :). 
