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# How to Repair NinjaTrader 8

| NinjaTrader’s performance may occasionally degrade due to various factors. A commonly effective first step in resolving these issues is to perform a repair on the NinjaTrader application.


1. **Find the NinjaTrader installation file you downloaded**. In most cases- it’s located in "**This PC**" > "**Downloads**":


![](https://storage.crisp.chat/users/helpdesk/website/-/5/4/1/3/5413a8a0321f3000/image_158mjzf.png)

2. Run the installer, on the first step- **click "Next"**:


![](https://storage.crisp.chat/users/helpdesk/website/-/5/4/1/3/5413a8a0321f3000/image_fqyro9.png)

3. On the second step in installer- choose the **"Repair"** option:


![](https://storage.crisp.chat/users/helpdesk/website/-/5/4/1/3/5413a8a0321f3000/image_1icfc5g.png)

4. On the third step- it will ask you to confirm it.** Click on "Repair" again**:


![](https://storage.crisp.chat/users/helpdesk/website/-/5/4/1/3/5413a8a0321f3000/image_1pvievk.png)

5. **Repairing process will begin** , so just click **"Finish"** once it’s done:


![](https://storage.crisp.chat/users/helpdesk/website/-/5/4/1/3/5413a8a0321f3000/image_cabvfv.png)


* Also a great way to improve NinjaTrader 8 performance is to **clear cache**, you can check the guide [here](https://tradingvps.crisp.help/en/article/how-to-clear-ninjatrader-8-cache-1ubsec7):