Have many problem with ubuntu 10.10

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http://askubuntu.com – I have Acer TravelMate 4000 with Memory : 984.8 MB processor : Intel (R) Pentium (R) M processor 1.80 GHz I installed ubuntu 10.10 and I faced many problems: 1) Software center doesn't work. 2) I don't find a compatible Skype for this version. It would be nice from you if you can support me what I must to do !! Is there any other version work on my laptop ?? (HowTos)