You should read it carefully before making PSEB “Government”, there is a reason they are using “org.pk” & not “gov.pk”. Owned by Government, neverthless a Limited Company.
http://www.pseb.org.pk/item/aboutus
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Government of Pakistan is hosting their servers in Pakistan, if u are opening the website in USA/Canada (or even Europe) it supposed to be slow.
I do agree that many links are broken because whoever is updating is working on some XP workstation and often forgets to update the links properly & leaves it like that as Windows automatically sets up during the creation of those webpages. I’d suggest, that it should be complained about to proper authorities.