Want to find out if this was scam .

I just got called from Microsoft office in california , and im from eastern europe so i find this strange . They didnt asked for any account information or something like that . They just told me that someone is stealing my inditity  or something like that , then asked me to type www.fastsupport.com in my browser , and after that to instal "GoToAssist" .After that they installed Advanced WindowCare V2 on my pc , show me the problems i have , and offer me to buy some program from Microsoft , with 1 year plan, 5 years plan, life plan . I didnt buy it so I wonder was that a scam or anything like that , and should i be afraid . And after they finished they uinstalled those programs from my pc. If that wasnt scam and my pc is in the condition they said , i might buy it .