PC Tech Support for LinuxMint 16 Desktop Internet Issues

I'm a knowledgeable PC user (since 1985), former PC tech support person, and former PC tech writer who has switched from Windows 7 to LinuxMint 16 (petra) 64-bit. I've used Ubuntu in various distros before without these problems. I've reinstalled several different distros in my effort to resolve these issues and am now using LinuxMint 16. I haven't been able to resolve these problems and they are critical to my continuing to use Linux, which I want to do. Problem 1. Unsuccessful Logins (cookie issues, even though cookies are enabled; WordPress sites) even though I can log into other sites Problem 2. Unsuccessful Site Usage (session expiration issues). Can log in but when I try to do something on the site, I get bounced out for expired session. Problem 3. Unsuccessful Login (No error message; the site just reloads the page and asks me to log in again) Problem 4. Media Players don't work at BlogTalkRadio.com. I want all of these issues resolved, so I can use the web as I could under Windows 7. I can provide info on current Flash, Java, javascript, details for my PC. I'm running an HP-Compaq small form factor desktop PC with a 3 GHz Intel dual-core processor with 4 GB RAM.