|It is safe. |
Kind of hard to tell on newer MS OS's. They could use memory for other valid reasons.
The best way is to compare a known good baseline. I doubt you have any logs from days one and two so that is out.
You can't really tell if you have malware. You can use tools such as MS's security essentials to help protect your system. Some rootkits are impossible to detect. They can only be removed by a clean install.
If this happened a few days ago consider a restore point maybe.
Why did it take me over a year to phone in a problem to ATT?