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Windows 7 Successfully Installed on a Pentium II

By - Source: Tom's Hardware US | B 5 comments

What are the minimum system requirements for running Windows 7?

When Microsoft made the Windows 7 RC available, it also issued an official list of system requirements for anyone hoping to install the OS:

  • 1GHz processor (32- or 64-bit)
  • 1GB of main memory
  • 16GB of available disk space
  • Support for DX9 graphics with 128MB of memory (for the Aero interface)

Not exactly monstrous and the same as what you needed to run Vista years ago. That said, one Windows enthusiast decided to push the limits and in a kind of “how low can you go” scenario, managed to get Microsoft’s latest OS running on a Pentium II at 266 MHz CPU, 96 MB of RAM and a 4 MB graphics card.

The user hackerman1 posted about his efforts on the Windows Club Forums for the world to see and his fellow posters we, like the other users on the forum, were suitably impressed. Hackerman1 said he did three different tests (128 MB, 96 MB and 64 MB of RAM). Of these, he had success with both 128 MB and 96 MB, while his 64 MB attempt returned error messages reading “insufficient memory.”

Hackerman1 went on to say that he also has a Pentium I with a 166 MHz CPU and a 1 MB graphics card and says if he can dig up the PSU, he’s going to test that next. Check out the screenshots below.


*All pictures credited to the original poster (hackerman1) on

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  • 0 Hide
    will_chellam , 23 June 2009 00:46
    But how well does it run crysis.....

    Seriously - kudos on getting it to work, you've got to wonder whether its any use for anything though - I bet even wordpad or calculator take an age to load ... i'd like to see some startup / app benchmarks :) 
  • 0 Hide
    invisik , 23 June 2009 01:29
    Wonder if i could install os 7 for my iphone. =D
  • 0 Hide
    wifiwolf , 23 June 2009 07:43
    sometimes it just works (like apple :?)
    I had a 166MMX that I overclocked to 3x100MHz, 128MB RAM, ran XP better that pentium 3 at 600MHz 64MB, really smooth.
  • Display all 5 comments.
  • 0 Hide
    jrtolson , 23 June 2009 14:17
    i likw these sort of tests, this is what puts me off upgrading from xp the system requirments for the new microsoft operating system is stupid.. i firmly believe most of it is bloatware and that the code is so inneficient it is just a waste of computing resourses... imo microsoft should only give the windows development team pc's that are 10 years old. so that when the os is run on a new machine it is very fast and sleek :-)
  • 0 Hide
    Anonymous , 23 June 2009 21:19
    I have seen XP on a laptop powered by an AMD K5 350mhz and 64Mb of Ram.
    It was as slow as an asthmatic ant crawling up a hill with heavy shopping but worked nonetheless.