Why not check the requirements page?
http://join.msn.com/messenger/requirements2000
I have Windows 98SE , 256MB RAM,IE6. I have downloaded & am using MSN Messenger7 for PC to PC conversations (audio & video) between India & the US. I want to know if MSN Messenger also has a PC to phone service to call from my PC in India to a US phone number. If so, which version should I download? Will it run on Win98? Pl give the URL & all relevant details.
Is there any other cheap , reliable PC to phone service for calling a number in the US? It should run on Win98. I tried Yahoo version 8 but my system freezes everytime I try to download it. Also, I read in some user's forums that it has problems. Skype is supposed to be good but I think it requires Win2000 or XP.
I'm desperate to get an inexpensive PC2phone service . Please help!

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