HP Compaq Presario CQ60

[bonnevie]

I'm running LL4.0 on this exact same machine as I write this. No problem installing it.  Fun fact: I did have problems with 2x and 3x series:  "Installer crashed" while creating user profile was a frequent occurence and I had to try installing again and again... For some unknown reason, it did finally work (otherwise I wouldn't be here).  With the 4.0 serie, none of this.  I didn't use Systemback or any other backup software, did not connect while installing and did not check the options.  Maybe not related to your problem, just a feedback from a user with similar hardware. 
Cheers!