26-06-2013 13:17 - edited 26-06-2013 13:17
Thank you for posting and welcome to the forum!
We'd like to further assist you with your concern. We just want to know the model of your phone.
If your using a Lumia phone, Nokia Ovi Store is not supported but your phone should have the built-in Marketplace for WP7.5 or Store for WP8.
If your phone is a Symbian or S40 device, you may try to install the Nokia Ovi Store by downloading it from the mobile website. Open the browser on your phone and go to store.ovi.mobi to download the Ovi Store client.
Another way is to use Nokia Suite. Just connect the phone to the PC via a compatible USB cable and launch the Nokia Suite. Go to SW Updates, click on Application Updates and install the Nokia Ovi Store update if it's available. This will automatically install the Nokia Ovi Store client on your phone.
You can get Nokia Suite from this link: Nokia Suite download.
For older devices which aren't compatible with Nokia Suite, try PC Suite instead. Get it from here: Nokia PC Suite.
Hope this information helps.