YES, it does matter!
We hear many times about how an over-eager admin logs in as himself to load QC, then leaves the company and later they cannot patch because of various Windows rights issues due to file ''ownership''.
If you can at all avoid it, DO NOT log in as an actual person/user to install and maintain QC/ALM, this should be a ''service'' account that has local admin rights on the PC (see Install Guide Prerequisites section - ''All related installation operations for the same version, such as patch installations or
uninstalling ALM, must be performed by the same user''.
Many companies have issues when ''Joe Admin'' loads QC, then leaves the company - later they cannot patch because they cannot log in as Joe Admin later to do it.
**Recommendation:** Setup a Windows domain or local ''Service Account'' to use on the QC/ALM server that has local Administration rights and always use that user to do installation and maintaining of QC/ALM.