One of the biggest mistakes that any borrower can ever make is trying to dispute their entire credit report. Typically, traditional credit repair companies will utilize this tactic; however, it has been proven very risky and potentially debilitating to the overall purpose. By disputing your entire report, you may remove some of positive aspects that are boosting your score.
To have a good credit score, you need to have positive information reported into your credit report on a monthly basis. The easiest way to do that is with a credit card. Just try to keep your utilization low (although there is no magic number, VantageScore released data showing that people with excellent credit scores tend to have utilization below 10%). And make sure you pay your statement balance in full and on time every month. If you repeat this, over time your score will improve.
Each time you apply for credit is listed on your credit report as a “hard inquiry” and if you have too many within two years, your credit score will suffer. In general, a consumer with good credit can apply for credit a few times each year before it begins to affect their credit score. If you’re already starting with below-average credit, however, these inquiries may have more of an impact on your score and delay your ultimate goal of watching your credit score climb.