What exactly? Parts of \windows, \program files, information from other folders, individual profiles?
And what were those pop-up messages exactly? What components weren't installed properly?
Are those folders really gone? With how much Gb (or Mb) did the available disc space increase? Did you check the recycle bin?
If you want to sue anybody, it's more like Microsoft than Trend Micro. Trend Micro didn't write the malfunctioning system restore. But, somehow, I'm afraid you'll have to resort to your backup to get your data back. If you don't have a backup, the best thing to do is remove the drive from your PC immediately, put it in an external enclosure and use datarecovery software on another PC to see what you can salvage.
My system has run great for years,I`ve never had problems al all,but yesterday I had to renew my trend Micro Antivirus software and the nightmare began!after pay the renewal fee I did proceed to download the software.After the instalation ,I started to have differents pop up windows saying that some components had not been installed properly,I did contact Trend Micro Tech Support and you Know what?They told me to do a system restore.I did that, but after reboot my computer,a lot of softwares and folders were not there anymore.How can I get it back!I need that information or do I have to sue Tren Micro?