Empty form take to long to display

I have very strange behavior on one of the user's laptop. When she opens empty form in one of our applications it takes very long time. 1-2 minutes.
All other users OK in the same application the same pages, but this user is not. She has this problem with all her laptops - 3 in last year. she has brand new one, fresh build last week and still the same. The same problems in IE and Chrome.
Any ideas where to look?
LVL 11
Lara FEAAsked:
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jcimarronConnect With a Mentor Commented:
trofimoval--Since the PC is so new, you might consider a format and reinstall of the OS.  This time it might be best for you or the user to install everything new for the browser rather than using the old internet settings.   I presume the browser is an uptodate version.
Lara FEAAuthor Commented:
This is one single user out of 200 using this application. and it is repeated behavior in all laptops she had. I think it is related to browser/PC/user settings. Since all laptops were rebuild with migrating her internet settings.
trofimoval--Have you scanned for malware?
Lara FEAAuthor Commented:
yes,  AV/malware is up to date and no problem. this is brand new laptop build 2 days ago
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